Split pulley



H. T. ADAMS AND H. ALTMAYER.

SPLIT PULLEY- APPLICATION FILED SEPT-2| 19I9.

1 3 5 1 1 97 Patented A11 31, 1920.

'2 SHEETSSHEET l.

H. T. ADAMS 'AND H. A'LTMAYER".

SPLIT PULLEY.

APPLICATION FILED SEPT. 2, I919.

' 1,351,197. I Patented Aug. 31, 1920.

2 SHEETS-SHEE] 2- pairs STATES PATENT OFFICE.

SPLIT PULLEY.

Application filed September 2, 1912).

To all whom it may concern Be it known that we, l-lonaon T. Animus andlluoo AL'rMAYna, citizens of the United States, residing in the city andcounty of San Francisco and State of California, have invented a certainnew and useful Improvement in Split Pulleys, of which the following is aspecification.

Our invention relates to improvements in split pulleys wherein a rimsegment operates in conjunction with a rim opening to provide acontinuous circular periphery; and the objects of our invention are:

First, toprovide an improved split pul- Second, to provide an improvedsplit pulley having improved means for removing a segment of said rim to-i.acilitate application of the pulley to a line shaft or the like andintermediate the ends thereof or between other appa 'atus on said shaftwhere space is limited; 1

Third, to provide improved means for machining the several partseffectively and economically to aline the several parts-concentricallyFourth, to provide an improved split pulley of the character describedwhich may be detachably mounted upon hubs of different bore diameters;

Fifth, to provide an improved split pulley of the character describedhaving an improved detachable split hub whereby said hub may be firstsecured to a line shaft or the like before mounting the pulley rim; and

Sixth, to provide a split pulley of the character described having animproved hub detachably connected thereto whereby rims of variousdiameters may be applied to said hub without removing said hub from theline shaft, said hub having means for alining said pulley rimconcentrically with the shaft and hub thereon.

We accomplish the above and other objects'by means of the improveddevice disclosed in the drawings forming a part of the presentspecification wherein like characters of reference are used to designatesimilar parts throughout the said specification and drawings, and inwhich Figure 1 is a broken elevation of our improved device;

Fig. 2 is a broken side view, partly in section; and

Specification of Letters Patent.

Patented Aug. 31, 1920.

Serial No. 321,248.

Fig. 3 is a side elevation of the split pulley with the rim segmentremoved disclosing the split hub. i

Referring to the drawings the numeral 1 is used to designate a rimhaving an opening in one side thereof and seats 2 arranged at thetransverse edges of said opening. Adjacent the seats 2 we have providedlugs apertured to receive threaded studs 1 which engage threadedapertures 6 within the edges of a rim segment 7 within the openingof'the rim 1.

The rim 1 is provided with an internal flange 8 in turn provided with anannular seat 9 to engage the concentric periphery of '-the flange 11upon a split hub 12, said rim flange. 8 being secured to the hub flange11.

The rim flange 8 is also provlded w1th an opening allned with theopening in the rim 1, the said sides of said flange opening beingprovided with grooves lei having pockets or recesses 16 therein andarranged parallel to a diameter passing through the flange and mmopenings.

The rim segment 7 is provided with an eX- tension 17 whose sides arearranged substantially parallel with and spaced apart from the grooves14, the purpose of which will hereinafter be more fully set forth.

The split hub 12 is first cast integral and with a longitudinallydisposed slot 19 therein said slot 19 extending nearly the entire lengthof the hub 12 and nearly to the edges of the hub flange 11.

While in this integral condition the hub 12 is bored the requireddiameter to receive the shaft 20 and the periphery of flange 11 formedconcentric therewith, after which said hub is cracked or split apart byinserting a chisel or other suitable tool within the slot 19 andstriking said tool with a hammer or the like.

This operation will provide two halves having semicircular seats andlugs at the corners of the hub and flange which lugs are later machinedto clear when the two halves of thehub 12 are assembled on the shaft 20.As the hub 1.2 is bored to it the shaft 20 before being split it isobvious that the two split halves, when assembled upon said shaft 20,will center the periphery of the hub flange 11 upon said shaft 12.

Bolts 21, or any other suitable device, may be used to securely clampthe split hub 12 upon the shaft 20.

' After the split hub 12 has been assembled ing metal 18 is poured in amolten state into the grooves 1 1 and pockets 16 thereof so that aftersaid plastic metal has hardened the rim segment 7 may be withdrawn andreadily alined when replaced by the plastic metal which correctlypositioned and alined said segment relatively to the rim 1 and flange 11when poured. I V

In operation the rim segment 7 and extension 17 thereof are firstremoved from the rim 1 of the pulley and the flanged split hub 12 isalso disassembled. The two halves of the split hub 12 are assembled onthe shaft 20 by means of the-bolts and nuts 21, or other suitablesecuring means, and the rim 1 is then mounted upon the shaft by movingsaid rim 1 to pass the shaft 12 through the opening in said rim 1 andflange 8 thereof and to engagethe annular seat 9 of said rim flange 8with the periphery of the centered hub flange 11.

The rim segment 7 is next moved into alinement by sliding the extension17 between the grooves 1a until the edges of said rim segment 7 areproperly seated upon the seats 2 adjacent the edges of the opening inthe rim 1. c

, The threaded studs 4 are then passed through the apertured lugs 3 toengage the threaded apertures 6 within the edges of the rim segment 7thereby firmly securing said rim segment 7 in alinement with theperiphery of the rim 1.

The extension 17 is then secured to the hub flange 11 by means of thebolts 15.

It is obvious from the foregoing. thatv we have provided a new andimproved split pulley detachably mounted upon the split hub whereby theoperation of applying said pulley to a line shaft or the like wherespace is limited may be facilitated.

It is also obvious that we have provided improved means whereby saidpulley rim may be properly alined and centered upon the shaft as well asimproved means for alining and centering the split hub.

The details of construction are so susceptible to variation that we donot wish to confine ourselves to the precise construction disclosed inthe drawings but rather to avail ourselves of any modification that mayfall properly within the scope of the appended claims.

Having thus described our invention what we claim as new and desire tosecure 7 by Letters Patent is:

1. A; split pulley comprising a hub having an annular flange; a rimdetachably mounted upon the flange and having an opening in one'sidethereof; and a rim segment arranged to seat within the opening in'therim and to be detachably connected to the hub flange. V

2. A split pulley comprising a hub having an annular flange; a rimdetachably mounted upon the hub flange and having an opening in one sidethereof and grooves alined with the edges of said opening and parallelwith a diameter of the rim passing through the center of said opening,and likewise provided with seats on the edges of said opening; and a rimsegment seated upon said seats and detachably connected to the hubflange, said rim segment being also provided with an extension toslidably engage the grooves and hub flange; and means for securing saidextension of the rim segment to said hub flange.

8. A split pulley comprising a rim hav ing an opening in' one sidethereof and a flange having grooves therein arranged parallel with adiameter passing through the center of said opening, said grooves beingprovided with pockets; a rim segment mounted within the rim opening andhaving an extension whose sides are arranged parallel with and spacedapart from the grooves; and a plastic filler to fill in the spacebetween the extension edges and the grooves and likewise within thegroove pockets to aline the rim segment with the 1. A. split pulleycomprising a rim having an opening in one side thereof and seatsarranged at the edges of said opening; a flange on the rim provided withan opening alined with the rim opening and provided with groovesarranged parallel to a diameter passing through the center of the flangeand rim openings, said grooves being likewise provided with pockets; anda rim segment seated within the seats and having an extension providedwith edges arranged ter passing through the center of theflange and rimopenings, said grooves being likewise provided with pockets; a rimsegment seated within the seats and having. an extension provided withedges arranged parallel with and spaced apart from the grooves; a fillerwithin the grooves and groove pockets and extending to the edges of theextension to aline said rim segment with the rim; and means for securingthe rim segment to the seats on the edges of the rim opening.

6. A split pulley comprising a rim having an opening in one side thereofand seats arranged at the edges 01' said opening; a flange 011 the rimprovided with an opening alined with the rim opening and provided withgrooves arranged parallel to a diameter passing through the center ofthe flange and rim openings, said grooves being likewise provided withpockets; a rim segment seated within the seats and having an extensionprovided with edges arranged parallel with and spaced apart from thegrooves; a filler within the grooves and groove pockets and extending tothe edges of the extension to aline said rim segment with the rim; meansfor securing the rim segment to the seats on the edges of the rimopening; a

split huh having an annular flange thereon; and means for seeming therim flange and rim segment extension to the hub flange.

7. The combination with a split pulley having an opening in the sidethereof, and a rim segment detachably mounted within said opening of ahub split longitudinally; and means for securing said hub to thedetachable rim and rim segment.

8. The combination with a split pulley having an opening in one sidethereof and a rim segment detachably mounted within said opening, of aflanged hub split longitudinally; means for centering the rim upon theflange of the hub; and means for detachably connecting said rim to saidflange.

In witness whereof we hereunto set our signatures.

HORACE T. ADAMS. HUGO ALTMAYER.

